/Engine/Source/Runtime/Engine/Public/kDOP.h
This structure is used during the build process. It contains the triangle's centroid for calculating which plane it should be split or not with
template<typename KDOP_IDX_TYPE> struct FkDOPBuildCollisionTriangle
KDOP_IDX_TYPE
MaterialIndex
The material of this triangle
FVector4
V0
First vertex in the triangle
FVector4
V1
Second vertex in the triangle
FVector4
V2
Third vertex in the triangle